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2. Which of the following materials is absent when coal is formed? A. carbon B. oxygen C. water D. hydrogen
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4 votes
2. Which of the following materials is absent when coal is formed?

A. carbon
B. oxygen
C. water
D. hydrogen

User Printemp
by
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1 Answer

4 votes

Answer:

A carbon

Step-by-step explanation:

User Takehiro Adachi
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